I'm probably being paranoid but DD2 is 5 weeks old, born at 33 weeks and she is generally well but she's been making this grunting/snorting noise, almost like she's congested but right at the back of her nose/throat. It's mainly when she breathes in. She didn't have any breathing problems when she was born or when she was in SCBU - no CPAP, Vapotherm or Oxygen. The grunting/snorting is relatively new but seems to have got more obvious today. Any ideas what could be causing it? Could it just be where her airways are still small?